A543 Steel Pressure Vessels
A543 is divided into two types, B and C. However, these alloy steel plates in the rolled state are sensitive to cracking during flame cutting, transportation and handling.

A543 Hardened and tempered nickel-chromium-molybdenum alloy steel plate for the fabrication of welded pressure vessels and other pressure equipment. These alloy compositions are typically applied to structures with plate thicknesses of 2 inches or more.
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